157291201 has 4 divisors (see below), whose sum is σ = 157316692. Its totient is φ = 157265712.

The previous prime is 157291171. The next prime is 157291217. The reversal of 157291201 is 102192751.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 102192751 = 61 ⋅1675291.

It can be written as a sum of positive squares in 2 ways, for example, as 117158976 + 40132225 = 10824^2 + 6335^2 .

It is a cyclic number.

It is not a de Polignac number, because 157291201 - 2¹⁹ = 156766913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157291201.

It is not an unprimeable number, because it can be changed into a prime (157291231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2971 + ... + 17983.

It is an arithmetic number, because the mean of its divisors is an integer number (39329173).

Almost surely, 2^157291201 is an apocalyptic number.

It is an amenable number.

157291201 is a deficient number, since it is larger than the sum of its proper divisors (25491).

157291201 is a wasteful number, since it uses less digits than its factorization.

157291201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25490.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 157291201 is about 12541.5788878434. The cubic root of 157291201 is about 539.8023979793.

The spelling of 157291201 in words is "one hundred fifty-seven million, two hundred ninety-one thousand, two hundred one".